Means for automatic control of gas supply in gas cooking stoves



No. 6ll,425. Patented Sept. 27. I898.

.1. 'WYNN. MEANS FOR AUTOMATIBCONTBOL 0F GAS SUPPLY IN GAS COOKING STUVES. (Application filed Feb. 2, 1897.) (No Model.)

NlTED STATES PATENT QFFICE.

JOHN WYNN, OF CARDIFF, ENGLAND.

MEANS FOR AUTOMATIC CONTROL OF GAS-SUPPLY IN GAS COOKING-STOVES.

SPECIFICATION forming part of Letters Patent No. 611,425, dated September 2'7, 1898.

Application filed February 2, 1897. Serial No. 621,675. (No model.) Patented in England September 23,1896, No. 21,050; in France January 9, 1897, No. 262,924; in Belgium January 11, 1897, No. 125,674; in Canada February 24:, 1897, No. 55,093; in South Australia March 2, 1897,110. 3,575 inVictoria March 3, 1897,110. 13,987; in New South Wales March 5, 1897,1T0, 7,806; in Queensland March 6, 1897, No. 3,777; in Tasmania March 8, 1897,110. 1,842; in West Australia November 30, 1897, No. 1,883, and in New Zealand December 3, 1897,110. 10,180.

To all whom it may concern:

Be it known that I, JOHN WYNN, a subject of the Queen of Great Britain, residing-at Andrews Hall Chambers, 32 St. Mary street, Oardiff, in the county of Glamorgan, England, have invented certain new and useful Means for the Automatic Control of Gas-Supply in Gas Cooking Stoves, (for which I have obtained patents in Great Britain, No. 21,050, dated September 23, 1896; in France, No. 262,924, dated January 9, 1897; in Belgium,

No. 125,674, dated January 11, 1897; in Can-- ada, No. 55,093, dated February 24, 1897; in Queensland, No. 3,777, dated March 6, 1897; in New South Wales, No. 7,306, dated March 5, 1897 in Victoria, No. 13,987, dated March 3, 1897 in Tasmania, No. 1,812, dated March 8, 1897; in South Australia, No. 3,575, dated March 2, 1897 in West Australia, No. 1,883, dated November 30,1897, and in New Zealand, No. 10,180, dated December 3, 1897,) of which the following is a specification, reference being had to the accompanying drawings.

. This invention relates to means whereby the supply of gas to the burners of gas cooking-stoves is automatically regulated when the vessel to be heated is placed upon the bars above the burner.

According to my invention I connect with the plug of the gas tap or cook for regulating the supply of gas to the burnera spring-controlled arm which projects above the bars of the stove and is so arranged that when a vessel is placed on the stove above the burner the said arm will be shifted in opposition to the spring and the gas turned on. For obtaining various heating effectssuch as boiling, simmering, and warming-the vessel is moved to such a position that the arm can move backward or rise more or less by the action of the spring, whereby the tap will be partially closed. For cutting off the gas-supply altogether the vessel is entirely removed from contact with the arm, which is thus permitted to move backward or rise under the influence of the spring, and the tap is then quite closed by the spring.- To facilitate the action,I furnish the arm with a roller at its end.

In order that my invention may be more clearly understood, I will describe the same with reference to the accompanying drawings, in which Figure 1 illustrates in vertical section the upper part of a gas cooking-stove having a convenient form of my invention applied thereto. Fig. 2 is a detail end elevation of the bearing N, the tube F being shown in section. Fig.3 is a detail sectional view of the cap J, showing the pin L in solid lines.

A is a burner situated beneath the bars B and connected With agas-supply pipe 0 by a tube D and a tap E. v The plug of the tap E is connected with and operated by means of a tube F, which'has fixed to it an arm G, furnished with a roller H at its free extremity. The arm is adapted to project between and above the bars B and is maintained in this position when the burner A is not in use by a spring 1, contained within the tube F. The said spring is secured at one end to the plug of the tap E and at the other end to a cap J, which is mounted loosely on the end of the tube F and which can be adjusted so as to vary the effort of the spring on the tube F and arm G. When the spring has been-adjusted, the cap J is secured by means of a pin L, which is pushed into a hole in the fixed bearing N for supporting the tube F.

O is a pilot -burner supplied with gas through the pipe P, which communicates with the main supply-pipe O.

The springI is adjusted byfirst withdrawin g or sliding the cap J along the tube F away from the bearing N until the pin L fixed in such cap is withdrawn from the hole or slot L in said bearing N and then rotating such capto the required extent so as to increase or decrease the tension of the spring and then causing the pin L to take into the hole or slot L (or one of such holes or slots if more than one be provided) as the cap is brought into its normal position on the end ofthe tube F.

When a vessel is placed on the bars 13 above the burner A, it cants or moves forward or depresses the arm G, which, through the agency of the tube F, turns the plug of the cock E and so opens the gas-supply to the burner A, Where the mixture of gas and air is ignited by the pilot-light at the burner O. The heating is regulated by moving the vessel from the position where it is directly over the roller H to a position where it will allow the roller to project more or less above the level of the bars B and so partially close the gas-supply cock E. On removing the vessel entirely away from the roller, so as to free the arm G, the spring I turns the tube F and thereby closes the cock E. It is obvious that other arrangements of the spring for actuating the arm G may be adopted.

What I claim is- 1. In a gas cooking-stove, the combination of a supply cook or tap, a tube connected to the plug of said tap, a lever fastened to the tube and having its free end projecting through the bars of the stove, and a spring within the tube, one end of which is connected to the supply cock or tap and the other end to a fixed element, substantially as described and for the purpose stated.

2. In a gas cooking-stove, the combination of a supply cock or tap, a tube connected to the plug of said tap, a lever fastened to the tube and having its free end projecting through the bars of the stove, a spring within .the tube connected at one end to the supply cock 0r tap and at its other end with a fixed element, and means for regulating the tension in the spring, substantially as described and for the purpose stated. 7

3. In a gas cooking-stove the combination of a supply cook or tap, a tube connected to the plug of said tap, a lever fastened to the tube and having its free end projecting through the bars of the stove, a spring within the tube and connected to the plug of the tap, a cap loosely mounted on the tube and con nected to the spring, and a pin for engaging such cap with some fixed part, to prevent rotation of said cap by the spring, substantially as and for the purposes specified.

In testimony whereof I have hereunto set my hand .this 14th day of January, 1897.

JOHN WYNN.

Witnesses:

ALFRED JAcKsoN, II. J THOMAS. 

